Connection plug



May 17 192'?. 1,629,086

M. J. woHl. ET AL Y l CQNNECTION PLUG Filed Maron 1. 192:5

f INVENToRs BYW .7x/1k ATTORNEY A@ IIL Patented May 17, 1927.

1 AnNrreD srlxrEsA PATE-Nr o-FFIca.

Manieren J. Worin," oF LONG ISLAND CITY, ann MAX MAYBE, QE NEW Yong Y., AssrGNons To M. J. WoHL e oo., rnc., ornons ISLAND Grrr,y NEW YORK, 'a oon:-

:PORATION orI NEW Yfonx. Y Y

' CONNECTION liLUG.

Application meaxar'ch 1, 1923.` serialivo. 522,040.

This invention relates to improvements in electric connect-ion plugs or couplings, especially adapted to connect separable sections of conductors in an electriccircuit.l

' It is the 'object of the invention'to pro: duce a connection plug of the pin type in which the conducting cables or cords leading to and from the plug are anchored so that the Vterminal"connections within the plug can.y not be severed or iirlured by a strong pulll on the cable', before the electrical connection made by the plug-is opened.

It is' a `further object ofthe'invention to relievethe insulating material of the plug of strains produced by a pull on thebahle and to improve the clamping means.. ylVth these 'and other objects in viewythe -inven,

tion Consists in a reduction Vof the number of parts composing the plug to a very small number and in y'a simplification ot their design and arrangement which is hereinafter fullyv describedand finally pointed out in In the drawings which these speciiications:'-

VFig. 1 is a sectionalfront elevationfof aplug embodying the invention on lines 1-1 of Figs. 2.-4-I-5. The covering is omitted on-the upperhalf ot the plug.

Fig. 2 is a side elevation of a plugy embodying they invention. Y

Fig. 3 is a 'sectional' side elevation ofy a plug' on the line 3-3 of Fig. 1, showing the male andfemale parts separated and the covering in opened position on the latter;

Fig. 4 is a sectionalview ofa plug on a plane indicatedV by the line 4 4 of Fig, 1, the terminals are removed 'from this figure.

Fig. 5 is a sectional View of 'a plug on planes indicated by line 5--5 'of Fig. 1, the

form a part 'of terminals are shown in place inl this figure.-

Fig. 6 is a front elevation of lone of the iour shells forming the covering of the plug.

` Fig. 7 is-a topplan of'Fig. 6. y

This connect-ion plug consists of, twocooperating members 'Y10 vand 11 which :ane alike in construction with the only v'eX- ception that the Vmale part 10 is yprovided with binding posts 12'- having plug lends kwhich t into the socketV aperturesof bindf ing'posts 13 of' the female.part/11.v The binding` posts or terminals of either memberl are enclosed in the body partof the plug eens'isting ofl two; blocks of. insulating materialv 14 and r15= preferably of: thev same sizey and shape and closelyv abutting against each other on line4-4 ofv Fig. 1. BlockA 14 -is` provided with twocylindrical apertures for the body partfof theiloinding posts which rest `against ashoulder 16 -formecltherein near the dividin'gxline of. the two plug halves.

Block k15 is provided with cylindrical aper.-v

tures 1T arranged concentric with terminals 12 or 13 andV of a diameter "large and. deep f enough `tof accommodate theconn'ection ends The conductors are each led out lof the insideoftheblock 15 for veasier insertion of therconductors. 'Byj 'spreadino' them apart the conductors becomefastened in their final position in-apertures 19 and 20. The bindf ing posts 12 and 13 fit loosely in their en.- cl'osing v'apertures to facilitate the interchange of the female part of one plug with the' malepart ofia 'different one without eX- treme accuracy 'in manufacturing.

The twoy insulating blocks 14 and 15 are heldtogether and covered by Atwo metallic shellsB'Owhich are shoe-nin Figs. 6 and 7. These shells are exactly yalike in all particulars, so that four Ashells of the same kind cover the male and female members of one complete plug. The blocks 14 of either member protrude a shortdistance beyond the shells towards each other to eliminate the possibility ofl electrical contact between the shells ofthe two'parts. Each shellA .consists of -a thin metal sheet l30 which covers one half of the'insulating blocks 14 and 15..V The two shells whichfcover the sameplug memberl 31 provided *within pla-inv aperture andv Lon.

the left hand'side olf-the rell in aatapped unsy Fig. 5 that the two shells which form a covering couple, fit into each other at the sides of the plug when their inner faces are placed against each other, the tapped lug on 32 fitting into a semi-cylindrical recess at thc inner side of thel lug on ledge 3l. `Screws 22 enter a' short distance into the block 111 serving the double purpose of forming a pivot for the swinging of the two shellsI into the position shown in Fig. 3 and also to hold the blocks llland together and with-L in the covering.v The neck of the plug is formed by the hollow cylindrical parts 33 provided on their inside with the corruga tions 34 which grip the covering` of the con-Y ductor cable 23 when flanges 35 are pressed against each other by means of the clamping screws 36. The fiange 35 on the right hand side of each shell is provided with an open hole 38 while that on the left hand side vhas a tapped boss 39, to provide-a long thread for screw 36. The neck partl 33 and body part 30 of the shells are joined by a funnel shaped portion 37 to permit spreading of the conductors 21.

From the foregoing description it can be seen that the two shells which form the cover of each plug member coact with cach other and with the insulating blocks enclosed by them to form a metallic and rigid jaw clamp for the Vconductor cable 23.

|These clamping means depend nowhere on tension placed on screw threads cut into insulating material. The cable 23 is completely encircled by this clamp and a large exterior surface thereof is held under pressure which is practically uniform around its circumference. All current carrying bare parts are securely enclosed in heavy insulation andV the conductors require no sharp bends for their connection. The covering also serves to hold the two blocks lil'and 15 in alinement with each other, as only one of the blocks (il) is fastened to the shells the other one 15 is held in its place by the shells and block 14, but the blocks are not tightly fitted to the shells to permit for expansion. The electric conductors are easily connected to the Ytei'- minal. binding posts of the ping and their assembling is greatly facilitated by the two siots QQ-which make it possible to lay the conductors with their insulation and the connection loop formed thereon into their final Y position and avoids bending of the loops after threadingthe conductors through apertures 20. A further advantage is to be found in the fact that the binding posts with their connecting screws 18 are comstrain on the contact pins resulting from rough usage to which such plugs are exposed. Swelling or warping of the insulating material has practically no influence on the plug` as this material is loosely held in rclationto the terminals as well as to the cnclosing shells.

Having thus described our invention what we claim as new and desire lo secure by liet- 'ters Patent is:

,1. In -a connection plug, an insulating block, a connection terminal held therein, a pair of `shells alike in shape covering said body, jaws forming a clamping tube at the cable endvof said shells an alining edge on one longitudinal side of each shell overlapping the outside of the other shell and pivot pins in said ledges near the terminal end of said plug forming means to oscillate 'sa-id shells with their aws, and means on said shells to press them and their jawsagainst each other.

2. A Aconnection plug comprisingl an insulating body, an electricalV contact heldwithin an aperture of said body, apair of metallic shells covering said body and overlapping each other transversely to their abutting faces at opposite sides of said body, said overlapping portions forming fineans to aline said shells with each other, pivots near one end of said overlapping shells and cooperating clamping jaws at the` other end of said shells. y y

3. in a connection plug, a Contact forming member comprising an insulating body, ,connection terminals held therein and a pair of jaw forming` shells covering said body pivotallv connected thereto, said pivot forminff common means to hold said shells on saidl body and to permit their oscillation.

1. ln a connection plug a pair of insulating blocks connection terminals enclosed therein, a pair of shells covering said blocks abutting against each other along a common plane, jaws forming a cable clamping means at one end of said shells, pivot pins near the other end thereof passing through both shells into the insulating material of one of said blocks, forming a fastening means to hold both blocks in said shells and vto permit their oscillation for clamping a cable in said jaws. f

5. In a connection plug, an insulating body a connection terminal enclosed therein a pair of shells enclosing said body abutting against each other* at a common plane longitudinally of said plug, a krecess anda ledge covering the saine, formed at one side of each shell, said ledge extending transversely across said plane forming means for lateral alinement of said shells fitting into the recess of its companion shell making said shells overlapping and exchangeable with each other. Y A M 6. In a connection plug, ay contact forming member consisting of a pair of insulating blocks enclosing connection terminals and aV pair of metallic shells covering both blocks, jaws on said shells to clamp a conductor entering said plug and a ledge on only one side ot' each shell forming aligning means 7. In a connection plug, a male or female member, an insulating body and a pairgo'f like covering shells exchangeable with each i other abutting longitudinally' of said body,

a lug on one side of each shelladapted to hold a pivot pin, a recess forinedin the opposite side of each shell so that'in covering position-on said block the lug of each shell fitsinto the recess on the other shelland forms a hinged joint by means of said pivot pin. l Y

8. In a connection plug an insulating body holding terminal connectors apair of shells enclosing said body divided along a common plane a lug on one side of each shell, a pin held in said lug, va recess formed in the opposite side of each shell so that the lug ot one shell occupies the recess of the other shell, said pin forming means to join said shell to each other and to holdf said body therein.

9. In aA connection plug, terminal connectors, an insulating body enclosin(r them, a pair of shells covering saidv body a utting against each other on a common plane, an

alining ledge on only oneside of each shell,

a pivot pin in each ledge nearthe terminal end of said plug passing through .the side wall of the other shell and extending into said insulating body, a pair of jaws formed by said shells at the opposite end of said plug, said pivot pin forming means to fasten said shells to said body and to permit their Y oscillation Jfor clamping said jaws together.

l0. In a lconnection plug a pair of insulating blocks a pair of terminal connectorseninto said stem-holdingblock and means on said jaws to pressy them against each other.

ll. A connection plug comprising an insulating body,`a Contact forming member enclosed therein, a casing for said body c0n-V sisting of two shells abutting against each other along a common plane passing longitudinally through the axis of said contact Yforming member, pivotfpins joining said dividing plane placed at the cont-act forming endVr of said plug` a single jaw on each shell and means to join said shells arranged per-v pendicularly to said pivot pins at the voppo-V site end of said plug, said shells being mounted to rotateron the axis of said pivot pins to form two single armed levers for pressing said jaws against eachy other.

l2. Aconnection plug comprising an insulating body a terminal thereima casing for said body consistinggof two shells abut-ting against each other on acommon plane a ledge on one side of each shell overlapping the other side of the adjoining shell, a pivotpin in each ledge extending intothe side of the other shellto hinge the twofparts of the casing together at one end' thereohto form two single armed levers by means of said shells` la clamping jaw formed at the other end ot' each shellrotatable about said pivot pin and means at the free lend of the levers formed by said shells to press them against each other.

13. In a1 connection plug a terminal convshells having Vtheir common axis in said nectoi` at one end thereof a pair ofinsu-v lating blocks each partly enclosing said connector and a casing for saidblocks consisting of two like counterparts each having a lug on one of its sides and a recess formed on its opposite side, fitting into a similar recess and lug of the other shell to make the shells exchangeable with each other and 'means formed by parts of said casing to clamp a conductor leading to said terminal.

14. In a connection plug a pair of insulating blocks holding a connection terminal, a

pair of covering shells for said blocks, one kof said blocks being ypivotally tastened to both shells and' theother block being loosely enclosedbyv said shells. 

